Holzmann, R., Hinz, R. P., & Gersdorff, H. v. (2005). Old-age income support in the 21st century: An international perspective on pension systems and reform. World Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHolzmann, Robert, Richard P. Hinz, और Hermann von Gersdorff. Old-age Income Support in the 21st Century: An International Perspective on Pension Systems and Reform. Washington, DC: World Bank, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHolzmann, Robert, et al. Old-age Income Support in the 21st Century: An International Perspective on Pension Systems and Reform. World Bank, 2005.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.